Hold open device



Jan. 25,1938. B. s. BERNHARD 2,106,443

HOLD OPEN DEVI CE Filed Nov. 5, 1956 lNVENTOR BENJAMIN 5. EERNHAED ATTORNEYS Patented Jan. 25, 1938 UNITED STATES HOLD OPEN DEVICE Benjamin S. Bernhard, Boston, Mass, assignor to The American Hardware Corporation, New Britain, Conn, a corporation of Connecticut Application November 5, 1936, Serial No. 109,244

6 Claims.

My invention relates to a hold open device for doors.

It is the general object of my invention to provide an improved form of hold open device.

Another object is to provide a hold open device which is of relatively small size, of simple construction, and pleasing appearance.

It isanother object to provide a hold open device in which the arms are at all times held against pivotal end play.

It is another object to provide an improved form of hold open device providing for rolling frictional means for holding the hold open arms in hold open position.

Another object is to provide a hold open device the operative parts of which are enclosed to exclude foreign matter and which may operate in lubricant.

Other objects and various features of inven-.- tion will be hereinafter pointed out or will become apparent to those skilled in the art.

In the drawing which shows, for illustrative purposes only, a preferred form of the inventll'1'.'

Fig. 1 is a fragmentary top plan view of a door and casing, showing my improved hold open device applied thereto;

Fig. 2 is a fragmentary enlarged top plan view of the hold open device of Fig. 1, parts being broken away to illustrate the interior construction, the hold open arms being shown in the hold open position;

' Fig. 3 is a View similar to Fig. 2 but illustrating the arms in the door closed position;

Fig. 4 is a sectional view in a plane substantially through the axis of the pivotal connection between the hold open arms} Fig. 5 is a top plan view of the parts shown in Fig. 4, the upper arm and nut being removed.

In said drawing, 5 indicates a door casing to which the door 6 is hinged. 7 indicates a well known or any desirable type of door closer and check. The arm 8 is non-rotatably connected to the shaft of the door closer I in well known mamier, while the longitudinally adjustable arm 9 is pivoted to the door casing. The arms 8--9 are pivotally connected to each other, all as is common practice.

In the preferred form shown the closer arm 8 is provided with a through bore or passage l0, an upper counterbore H, and a lower counterbore I2. Within the passage I0 is a radially inwardly projecting or raised friction surface l3 which is preferably arcuate to provide an ex 'tended friction area. A member, which I term a cam member l4, extends into or through the through bore I0 and may be provided with a disk-like bearing portion l5 rotatably fitting Within the counterbore ll. Within the counter- 5' bore I2 is a circular bearing plate It and the cam member M has an axially extending projection ll preferably of angular cross section fitting within a corresponding aperture in the bearing plate It so that the bearing plate and 10 cam member l4 rotate as a unit. Means such as a screw I8 serves to secure the cam member id and bearing plate l6 against separation. It will be noted that the disks or plates l5-l6 I serve as spaced apart bearings for the cam memher and serve to hold the latter against all axial movement on the arm 8 and yet permit free rotation thereof.

The frame arm 9, or more properly the yoke- |9 pivotally secured to the frame arm 9 at20, is provided on the under surface with radial serrations or teeth 2| andthe upper surface of the cam member is provided with corresponding teeth 22 to interfit with the teeth 2| and thus assist in holding the cam member I4 and frame arm 9 in angularly adjusted'position. In the preferred form the cam member has an upwardly extending pivot member 23 of circular cross section and the yoke, 19 is provided with a circular aperture to fit over such pivot projection 23. A. nut 24 screw threaded on the pivot 23 and engageable with the yoke l9 serves to force the yoke l9 into engagement withthe cam member Hi When the cam member and yoke have been angularly moved to the desired adjustedepositio'n'.

The cammember l4, withinthe, through bore I0 is provided with an eccentric 25 and there is provided a sleeve or ring 26 which is freely rotatable on the eccentric and also freely rotatable within the bore In. Now, when the arms 8-9 are moved relatively to each other, say, from the door closed position of Fig. 3 toward the door open position, the eccentric 25 turns in a clockwise direction and moves the ring b'odily and radially toward the surface l3 until some portion of said ring will engage said surface and block further turning movement. The area of contact is such that wearis very slight. Furthermore, since the ring is unrestrained, excepting when wedged between the parts 25- -I3, it follows that different parts of said ring will engage the surface IS on successive operations, thus distributing wear evenly entirely around the ring and greatly increasing the effective period of each adjustment. Since the eccentric and ring are enclosed they may run in a suitable lubricant, if desired.

The adjustment of the device is relatively simple. The nut 24 is backed off to free the arm from the cam member I4. The door is then moved to the desired hold open position. By means of a screw driver the pivot projection 23, and consequently the entire cam member, is then rotated until the ring 26 forcibly engages the friction surface I3. The nut 24 is then turned down so as to clamp the arm 9 on the cam mem-' ber M in the hold open position. Thereafter each time the door is swung to the hold open position, the ring 26 will frictionally engage said surface 13 and hold the door open as desired.

It will be seen that my improved hold open device is exceedingly simple in construction, of few parts, and cheap to manufacture. The device is small and of sightly appearance. There are few parts to get out of order and it will be noted that there will be substantially no end play of the arms since the latter are not separated during the door closing movement of the arms but always remain in the same relative position axially of the pivotal connection.

While the invention has been described in considerable detail and a preferred form illustrated, it is to be understood that various changes may be made within the scope of the invention as defined in the appended claims.

I claim:

1. In a device of the character indicated, an arm having a through bore and counterbores at opposite sides thereof, an arm having a cam member with a bearing portion fitting in one of said counterbores and extending into said through bore, a bearing plate bearing in said other counterbore and secured to said cam member, whereby the latter is journaled on said arm on opposite sides thereof, said cam member having an eccentric portion engageable with a cam surface within said opening upon relative rotation between said arm and cam member.

2. In a device of the character indicated, an arm having a through bolt and counterbores at opposite sides of said arm, a cam member having a disk-like bearing portion fitting one counterbore and rotatable therein, said cam member having a part extending through said through bore, a bearing disk rotatably mounted in the opposite counterbore, means for non-rotatably securing said bearing disk to said cam member, whereby said cam member is rotatably secured to said arm by means of spaced apart bearings, said cam member having an eccentric portion within said through bore, a roller on said eccentric portion and rotatable relatively thereto, said through bore having a cam surface engageable by said roller upon relative rotation of said arm and cam member, said cam member having an axially projecting pivot member, a second arm having an opening fitting said pivot member, said arm and cam member having mutually engageable interfitting serrations for adjustably holding said cam member and second arm in relative angular p0- si'tion, and a nut on said pivot member for forcing said second arm and said cam member into engagement with each other, whereby they are held against angular displacement, for the purpose described.

3. In a door hold open device, two pivotally connected parts, an eccentric carried by one part, a friction surface on the other part facing said eccentric, a friction ring between said surface and said eccentric and freely rotatable relatively to both said surface and said eccentric and radially movable by the latter into frictional binding engagement between said parts, for the purpose described.

4. In a door hold open device, two pivotally connected parts, an eccentric carried by one part, a friction surface on the other part facing said eccentric, a friction ring between said surface and said eccentric and freely rotatable relatively to both said surface and said eccentric and radially movable by the latter into frictional binding engagement between said parts, for the purpose described, with means to adjustably vary the angular starting position of the eccentric relatively to said friction surface.

5. In a door hold open device, two pivotally connected parts, an eccentric carried by one part, a friction surface on the other part facing said eccentric, a friction ring between said surface and said eccentric and freely rotatable relatively to both said surface and said eccentric and radially movable by the latter into frictional binding engagement between said parts, for the purpose described, with means to adjustably vary the angular starting position of the eccentric relatively to said friction surface, said means being mounted on said eccentric.

6. In a door stop, two pivotally connected parts, an eccentric carried by one part, a relatively raised arcuate portion on the other part forming a friction surface facing said eccentric and spaced therefrom, a friction ring between said eccentric and said surface and freely rotatable relatively to both said shoulder and said eccentric and radially movable by the latter into frictional binding engagement between said eccentric and said surface, for the purpose described.

BENJAMIN S. BERNHARD. 

